Button-hole attachment for sewing-machines



(No Model.)

J; H. PALMER.

BUTTON EoLE ATTACHMENT EOE SEWING MAGEINES.

`Feb. 9, 1886..

N. PETERS. PIwm-Lizhugnphur, wahingon. D. C.

Ihyrrnn dfrnfrrs JOI-IN I-I. PALMER, OF PHILADELPHIA, PENNSYLVANIA.

BUTTONwl-EULE ATTACHMENT FR SEWHNG=MACHENES.

SPECIFICATION forming part of Letters Patent No. 335,836, dated February 9, 1885- Application filed April 28, 1885. Serial No. 163,71. (No model.)

To all whom it 11m/y concern.-

Be it known Vthat I, J OHN H. PALMER, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Button-Hole Attachments for Sewing-Machines, of which the following is a specification.

My invention has reference to button -hole attachments for sewing-machines; and it consists in certain improvements upon the apparatus for regulating or adjusting the positions of the vibrating cloth-holding lever and in details of construction, the same being improvements upon the machine set forth in my application led January 9, 1885, and Serial No. 152,887, all of which improvements are fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof, and pointed out in the claims.

In the drawings, Figure l is a plan View of a button-hole attachment for sewing-machines embodying my improvements. Fig. 2 is a side elevation of same with the front part of the base-plate cutaway. Fig. 3 is a sectional elevation on line a: ar. Fig. 4 is a perspective View of vibrating and reciprocatinglevers for operating the cloth-clamp, the saine being Vseparated for the purpose of more clearly showing their construction. Fig. 5 is a perspective view of the inner end of the clothclamp spring. Fig. 6 is a perspective view of the adjustable hinge-blocks by which the two levers shown in Fig. ,4 are connected, and Fig. 7 is a perspective view of the adjustable hinge for regulating the throw of the pawl for operating` the intermittentlyrotating feedwheel.

A s the bed or base plate. The two-part lever B B is made in two parts, the fulcra of which is at b, andthe short arm B of the said lever is connected by the pin b to the pawl B3, the rotation of which about the shaft c being insured by the radiusbar B. The ratchetwheel C, with which the pawl B3 meshes, is securely attached to the cani D, which has an uneven number of projections, d, and a corresponding number of depressions, d', upon its outer edge or periphery, the number of which and turned around upon its fulcruni or aXis c the slide or bar is caused to reciprocate in the guides on the part A of the base-plate A. p

The spring C prevents the ratchet-wheel turning backward. It is necessary that the reciprocation of the slide should be in proportion to the vibrations of the leverB B as one to two, and to secure this proportionthe number of teeth on the ratchet-wheel c is twice4 j Aby its fulcrum-pin f, and carries the movable short arm F, which is secured thereto by an adj usting-screw and held in position by suitable guides. The short arm F is movable, so that the amount of vibration of the cam-bearing slide or of the lever G,with which the short arm engages through the agency of the slot g, can be varied. The free end of the long arm of the lever F is passed through the slide or bar E, being retained in the desired position within the slot E by an adjustable plate, E, secured to said slide, and by means of which the said lever directly receives its vibrations. The lever G is pivoted on the vertical pin H, and upon which it is vibrated by lever F, and its free end is provided with a slot, G', and the curved step g, by which it is held down upon the plate A through the agency of the anchor-block G2 and under which it is free to vibrate.

I is the clothclamp lever, and has avibrating and reciprocating action imparted to it. It is provided with longitudinal slots I and '13, in the latter of which the cam J works. This lever has the bent part Il secured thereto, one end of which is extended to form the base or lower jaw, K2, of the clotlrclamp, and the other end of which is bent over, forming one face1 against which the feeding-cam J works, and a support for the adjustable plate 13, provided with a face to inclose the cam on the other side, the said plate being adj ustabl y se cured by a screw, It The part I'l has the cutaway part or notch fi, under which the tongue IOO k of the spring K is inserted, the free end of said spring being connected to the upper jaw, K', of the cloth-clamp. By this construction the end lc is prevented from rising, and the 5 curvature of the spring K is such that the clamp is made to move from one side of the extent of said length.

3o pivoted together.

button-hole to the other to form the two rows ,of stitches thereof, and the formerot' which imparts a-longitudinal movement in the direction ofthe length of the button-hole to the The lever N swings about the pin H as a center and carries the pawl N', which works in contact with the ratchet-wheel M. One end of the lever N2 passes through the reciprocating slide-bar E, vand is pivoted at fn to the base-plate A, and the free ends of both theselevers are connected by the adjustable guides n, clearly shown in Fig. 7, which consist of two guides adapted to receive the said levers, which guides are By moving the guides farther from or nearer to the pivot n the amount of rotation of the ratchet-wheel M may be varied, being increased or decreased with each reciprocation of the slide E. The le- 5 vers G and I are connected together by the adjustable hinge-block, (shown in Fig. 6,) in which the two blocks P and R are connected together by a rivet or pivot connection, r. rPhe upper block, R, is made with 4o anges, which, when the said block is passed through the slot Iin the lever I, rest over the upper portion thereof and hold the said levers I and G together. The block P fits into the guide-slot G of the lever G, and it has an eX- 4 5 tension, P', which projects out from under said lever, and is brought up at the side thereof,

and to which the adj usting-spring S is secured. This adjusting-spring S is made to snap into the teeth T on the side of the lever G with 5o sufficient pressure to retain the block P in 6o and as this lever G is held upon the plate A by the anchor-block G2, it follows that this block really secures all parts upon the said base-plate and greatly simplifies the construction.

L is the needle-plate, and is adj ustably secured to the base-plate A, it being provided with a slot, Z2, and holes L, through which pins l and clamping-screw L', respectively, pass. The slot Z2 in the needle-plate is made with its greatest length in line with the length of the plate, to enable the same to, be shifted longitudinally, while the aperture L2 is made round and of greater diameter than that of the screw L', which passes through. By this means the needle-plate may be adj usted longitudinally or rock upon the pin Z. To obtain lateral adjustment, the needle-hole Z should be brought properly in line with the needle, and when so adjusted the screw Ll securely locks the plate in position. The object of this is to enable the said needle-plate to be so adjustable that the needle-hole l shall be located directly under the needle. The adjustingplate E'l allows` the cloth-clamp to be adjusted relatively to the needle or needle-plate by which the button-hole may be insured to come in such a position as to be worked wholly within the apertures in needle-cloth clamp.

A3 is the guide-plate to secure the attachment to the sewing-machine, and O is the clamping-screw to rigidly secure it in the desired position.

While I prefer the construction shown, owing to the fact that all parts are adapted to be stamped from sheets of steel, yet it is evident that the details of construction may be considerably varied or `modified without departing from my invention.

Having now described my iiiventiomwha-t I claim as new, and desire to secure by Letters Patent, is

l. In a button-hole attachment for sewingrnaehines,the combination of the reciprocating plate E with the cloth-clamp levers, the oscillating lever F, arranged to vibrate said clothclamp levers, and an adjustable connection between said plate E and lever F, substantially as and for the purpose specilied.

2. In a button-hole attachment for sewingmachines,the combination ofthe reciprocating plate E with the cloth-clamp levers, the oscillating lever F, arranged to vibrate said clothclamp levers, and an adjustable connection between said plate E and lever F, consisting of the plate E2, adj ustably secured to plate E, substantially as and for the purpose specied.

3. In a button-hole attachment, the clothearrying clamp and the base-plate A, in combination with the needle-plate L, having slot Zl and large hole L, and pin Zand clamp-screw L, substantially as and for the purpose specified.

4. In a button-hole attachment for sewingmachines, the combination of the reciprocating plate E with the cloth-clamp levers, the clothclamp, the oscillating lever F, arranged to vibrate said cloth-clamp levers, andan adjust- 'able connection between said plate E and lestantially as shown, with base-plate A,'pin H,

IOO

IIO

and an anchor-plate under which a part of the said lever G Works and by which it is held down upon plate A, substantially asr and for the purpose specified.

6. The combination of the Cloth-clamp lever I, having slot I', hinge-blocks RP, and vibrating lever G, having slot G, with means, substantially as described, to vibrate said lever G, base-plate A, pin H, and an anchor-plate under which a part of the said lever G Works and by which it is held down upon plate A, substantially as and for the purpose specified.

7. The combination of lever G, having ratchet I and slotG,means,substantially described, to vibrate saidlever G, With pin H, lever I, having slot I and a cloth-clamp carried by said lever, and hingeblooks P R, provided With the adj Listing-spring S, substantially as and for the purpose specified.

JOHN H. PALMER.

Witnesses:

R. M. HUNTER, E. M, BRECKINREED. 

